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Vishay General Semiconductor - Diodes Division SM5S22ATHE3/I
- Part No.:
- SM5S22ATHE3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-218AC
- Datasheet:
-
SM5S22ATHE3/I.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO218AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,189
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Product details
Overview
SM5S22ATHE3/I from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for automotive load dump protection in high-reliability power systems. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 5 mA, 3600 W peak pulse power (10/1000 μs), 101 V clamping voltage at 150 A, and operates up to TJ = 175 °C in the DO-218AC package.
For engineers reviewing the SM5S22ATHE3/I datasheet, SM5S22ATHE3/I pinout, SM5S22ATHE3/I application, or SM5S22ATHE3/I equivalent, this device is selected for robust overvoltage protection in 12 V automotive electrical systems where high surge capability, low leakage (<10 μA at VWM), and AEC-Q101 qualification are required.
Technical Context
The SM5S22ATHE3/I employs passivated anisotropic rectifier technology with junction passivation optimized for stable operation under thermal stress. Its unidirectional polarity configures the metal heatsink as the anode, enabling direct mounting to chassis ground for efficient thermal dissipation.
It meets ISO 7637-2 surge requirements for automotive load dump transients and complies with MSL Level 1 per J-STD-020 (245 °C peak reflow). The device delivers 3600 W peak pulse power with 10/1000 μs waveform and maintains <2.0 V forward voltage at 100 A surge current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before conduction begins; sets system working voltage margin. |
| VBR (min/typ/max) | 24.4 / 25.7 / 26.9 V at 5 mA - Confirmed breakdown threshold ensures predictable turn-on during transients. |
| VC @ IPPM | 101 V at 150 A (10/1000 μs) - Clamping voltage defines maximum downstream voltage stress during surge events. |
| PPPM (10/1000 μs) | 3600 W - Peak pulse power rating determines survivability against high-energy load dump pulses. |
| TJ max. | 175 °C - Junction temperature limit enables use in under-hood automotive environments without derating. |
| ID @ VWM | <10 μA at 25 °C - Low reverse leakage preserves battery life and minimizes standby power loss. |
| RθJC | 1.0 °C/W - Thermal resistance from junction to case supports effective heatsinking via metal heatsink terminal. |
Pinout & Package
Package: DO-218AC - Surface-mount, single-ended, metal heatsink cathode configuration with matte tin-plated leads; RoHS-compliant and AEC-Q101 qualified (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 | Anode | Connected to protected circuit ground or low-side reference; primary current entry point during clamping. |
| Lead 2 / Metal Heatsink | Cathode | High-current return path and thermal interface; must be soldered to PCB copper pour or chassis for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR drift ≤0.086 %/°C and reliable operation at TJ = 175 °C without parametric shift. |
| AEC-Q101 qualification (HE3 suffix) | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
| Meets ISO 7637-2 load dump specification | Withstands 12 V system load dump pulses (e.g., 10 ms exponential waveform up to 2500 W at TC = 125 °C). |
| MSL Level 1 compliance | Supports lead-free reflow up to 245 °C peak without popcorn or delamination risk. |
| Low forward voltage drop | ≤2.0 V at 100 A surge ensures minimal conduction loss and reduced I²R heating during clamping. |
Applications
| Automotive Load Dump Protection | Engine Control Unit (ECU) Power Input |
|---|---|
Use Scenario: Protecting 12 V vehicle electrical systems from alternator-induced load dump transients (up to 40 V, 100 ms duration). IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping transient energy to safe levels before it reaches downstream DC/DC converters and microcontrollers. Use Value: Prevents latch-up or permanent damage to sensitive electronics by limiting peak voltage to ≤101 V during 150 A surges. |
Use Scenario: Safeguarding the main 12 V input rail of engine control units exposed to cranking, jump-start, and battery disconnect events. IC Role / Device Role / Timing Role: Primary overvoltage suppression element placed immediately after fuse and before input filter capacitors. Use Value: Maintains system uptime by absorbing 3600 W pulses without degradation, validated per AEC-Q101 stress tests. |
| Body Control Module (BCM) Power Supply | Advanced Driver Assistance Systems (ADAS) Camera Power Rail |
Use Scenario: Securing low-quiescent current power supplies in BCMs handling lighting, door locks, and HVAC control. IC Role / Device Role / Timing Role: Standby-mode TVS providing low leakage (<10 μA) while maintaining fast response to sub-μs transients. Use Value: Extends battery life in always-on modules without sacrificing surge immunity or thermal stability at 175 °C. |
Use Scenario: Protecting 12 V input to ADAS camera modules mounted near engine compartments with high ambient temperatures. IC Role / Device Role / Timing Role: High-reliability transient suppressor mounted directly on camera PCB with metal heatsink tied to ground plane. Use Value: Ensures uninterrupted video feed by surviving repeated load dump events with no parameter drift across temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SM5S22AHM3 | Same VWM/VBR/PPPM specs; HM3 suffix indicates halogen-free molding compound and enhanced moisture sensitivity level (MSL 1) with tighter process controls. | Preferred for new designs requiring halogen-free compliance and extended reflow robustness beyond HE3 baseline. | Select SM5S22AHM3 for new automotive programs where long-term material compliance and process consistency are prioritized. |
| SMAJ22A | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA, and no AEC-Q101 qualification. | Suitable only for non-automotive, lower-energy industrial or consumer applications with less stringent thermal and reliability demands. | Choose SMAJ22A only if cost and board space are critical and automotive qualification or 3600 W surge handling is not required. |
Compared with SM5S22ATHE3/I, SM5S22AHM3 offers identical electrical performance with improved material compliance and process rigor, while SMAJ22A provides a lower-cost, lower-power alternative unsuitable for automotive load dump duty cycles or high-temperature under-hood deployment.
Availability
SM5S22ATHE3/I is available at Aetrix Electronics and suitable for automotive load dump protection, engine control unit (ECU) power inputs, and body control module (BCM) power supply designs requiring stable component supply, AEC-Q101 qualification, and high-temperature reliability.
Supply support for SM5S22ATHE3/I includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SM5S series is part of Vishay's PAR® TVS platform, engineered specifically for automotive-grade transient suppression in 12 V and 24 V systems with emphasis on load dump resilience, high-temperature operation, and AEC-Q101 validation.
FAQ
What is the maximum clamping voltage of the SM5S22ATHE3/I at its rated peak pulse current?
The SM5S22ATHE3/I has a maximum clamping voltage (VC) of 101 V at 150 A peak pulse current with a 10/1000 μs waveform. This value is measured and guaranteed per the Vishay datasheet (Document Number: 87609), ensuring predictable overvoltage limiting during automotive load dump events. The SM5S22ATHE3/I maintains this clamping performance across its full operating temperature range.
Is the SM5S22ATHE3/I qualified for automotive applications?
Yes, the SM5S22ATHE3/I is AEC-Q101 qualified and carries the HE3 suffix indicating RoHS compliance and whisker-resistant matte tin plating. It is explicitly intended for automotive use, including load dump protection in ECUs and BCMs, and meets ISO 7637-2 surge requirements. The SM5S22ATHE3/I qualification covers temperature cycling, high-temperature reverse bias, and mechanical shock testing per AEC standards.
What does the "HE3" suffix mean in SM5S22ATHE3/I?
The "HE3" suffix in SM5S22ATHE3/I denotes RoHS-compliant packaging, AEC-Q101 qualification, and compliance with JESD 201 Class 2 whisker testing. It also specifies matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. The "I" indicates packaging in 13″ plastic tape and reel with 750 units per reel and anode orientation toward the sprocket hole.
Can the SM5S22ATHE3/I replace the SM5S22AHM3 in existing designs?
The SM5S22ATHE3/I and SM5S22AHM3 share identical electrical specifications and DO-218AC packaging but differ in material composition and process control: HM3 adds halogen-free molding compound and tighter MSL assurance. While functionally interchangeable in most circuits, SM5S22ATHE3/I is not recommended for new designs due to Vishay's "Not For New Designs" status-use SM5S22AHM3 instead for future production.
What is the thermal resistance from junction to case (RθJC) for the SM5S22ATHE3/I?
The SM5S22ATHE3/I has a typical thermal resistance of 1.0 °C/W from junction to case (RθJC), measured under standard test conditions. This low value enables effective heat transfer from the silicon die to the metal heatsink terminal (Lead 2), supporting reliable operation at TJ = 175 °C when properly mounted to a thermally adequate PCB copper area or chassis ground.
SM5S22ATHE3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-218AC
- Series:
- PAR®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 101A
- Power - Peak Pulse:
- 3600W (3.6kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-218AC
SM5S22ATHE3/I FAQ
1.How can I place an order for SM5S22ATHE3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SM5S22ATHE3/I on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SM5S22ATHE3/I reliable?
The price and inventory of SM5S22ATHE3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM5S22ATHE3/I is usually 5 days.
3.What payment methods are accepted for SM5S22ATHE3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM5S22ATHE3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM5S22ATHE3/I?
SM5S22ATHE3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM5S22ATHE3/I order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SM5S22ATHE3/I?
For technical support, including SM5S22ATHE3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM5S22ATHE3/I requirements.
6.How does Aetrix verify that SM5S22ATHE3/I is sourced from the original manufacturer or authorized distributors?
All SM5S22ATHE3/I products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SM5S22ATHE3/I meets industry standards.
7.What is the process for return or replacement of SM5S22ATHE3/I?
All SM5S22ATHE3/I units undergo pre-shipment inspection (PSI). If there is an issue with SM5S22ATHE3/I, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SM5S22ATHE3/I part is unused and in its original packaging.
Return procedure for SM5S22ATHE3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM5S22ATHE3/I Tags
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